On Tue, 29 Aug 2006 16:14:13 -0400, "Bob" wrote:

I have an APC backup surge protected that keeps reporting that it is falling
over to backup power because it detected line noise. This happens 5-10
times a week. Anyone know what line noise is and what causes it?

I would check the receptacle to start. The unit detects a drop in
voltage and trips, right?. Have you checked the APC site for a FAQ?

Oren